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9.4 added a second description of GET DIAGNOSTICS that was totally
independent of the existing one, resulting in each description lying to the
extent that it claimed the set of status items it described was complete.
Fix that, and do some minor markup improvement.
Also some other small fixes per bug #14258 from Dilian Palauzov.
Discussion: <20160718181437.1414.40802@wrigleys.postgresql.org>
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From: Alexander Law <exclusion@gmail.com>
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Commit 2d0019049 moved enum ForkNumber from relfilenode.h into relpath.h,
but missed updating this documentation reference.
Alexander Law
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Document that index storage is dependent on the operating system's
collation library ordering, and any change in that ordering can create
invalid indexes.
Discussion: 20160617154311.GB19359@momjian.us
Backpatch-through: 9.1
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If there's anyplace in our SGML docs that explains this behavior, I can't
find it right at the moment. Add an explanation in "Dependency Tracking"
which seems like the authoritative place for such a discussion. Per
gripe from Michelle Schwan.
While at it, update this section's example of a dependency-related
error message: they last looked like that in 8.3. And remove the
explanation of dependency updates from pre-7.3 installations, which
is probably no longer worth anybody's brain cells to read.
The bogus error message example seems like an actual documentation bug,
so back-patch to all supported branches.
Discussion: <20160620160047.5792.49827@wrigleys.postgresql.org>
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Dilian Palauzov pointed out in bug #14201 that the docs failed to mention
the possibility of %R producing '(' due to an unmatched parenthesis.
He proposed just adding that in the same style as the other options were
listed; but it seemed to me that the sentence was already nearly
unintelligible, so I rewrote it a bit more extensively.
Report: <20160619121113.5789.68274@wrigleys.postgresql.org>
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Document these as "nearest integer >= argument" and "nearest integer <=
argument", which will hopefully be less confusing than the old formulation.
New wording is from Matlab via Dean Rasheed.
I changed the pg_description entries as well as the SGML docs. In the
back branches, this will only affect installations initdb'd in the future,
but it should be harmless otherwise.
Discussion: <CAEZATCW3yzJo-NMSiQs5jXNFbTsCEftZS-Og8=FvFdiU+kYuSA@mail.gmail.com>
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Mention it in the Notes section too, per suggestion from David Johnston.
Discussion: <20160520165824.22598.31426@wrigleys.postgresql.org>
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Per bug #14152 from Alejandro MartÃnez. Back-patch to all supported
branches.
Discussion: <20160520165824.22598.31426@wrigleys.postgresql.org>
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From: Alexander Law <exclusion@gmail.com>
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From: Alexander Law <exclusion@gmail.com>
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From: Alexander Law <exclusion@gmail.com>
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From: Andreas Seltenreich <andreas.seltenreich@credativ.de>
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From: Erik Rijkers <er@xs4all.nl>
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From: Alexander Law <exclusion@gmail.com>
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Commit b8a91d9d1c put the description of the new IF EXISTS clause in the
wrong place -- move it where it belongs.
Backpatch to 9.2.
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The server hasn't paid attention to the TZ environment variable since
commit ca4af308c32d03db, but that commit missed removing this documentation
reference, as did commit d883b916a947a3c6 which added the reference where
it now belongs (initdb).
Back-patch to 9.2 where the behavior changed. Also back-patch
d883b916a947a3c6 as needed.
Matthew Somerville
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David Rowley
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Previously recovery_min_apply_delay was applied even before recovery
had reached consistency. This could cause us to wait a long time
unexpectedly for read-only connections to be allowed. It's problematic
because the standby was useless during that wait time.
This patch changes recovery_min_apply_delay so that it's applied once
the database has reached the consistent state. That is, even if the delay
is set, the standby tries to replay WAL records as fast as possible until
it has reached consistency.
Author: Michael Paquier
Reviewed-By: Julien Rouhaud
Reported-By: Greg Clough
Backpatch: 9.4, where recovery_min_apply_delay was added
Bug: #13770
Discussion: http://www.postgresql.org/message-id/20151111155006.2644.84564@wrigleys.postgresql.org
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The docs were advising to use /usr/local/pgsql/man instead, but that's
wrong.
Reported-By: Slawomir Sudnik
Backpatch-To: 9.1
Bug: #13894
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With suggentions from Tom Lane.
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Dead or half-dead index leaf pages were incorrectly reported as live, as a
consequence of a code rearrangement I made (during a moment of severe brain
fade, evidently) in commit d287818eb514d431.
The index metapage was not counted in index_size, causing that result to
not agree with the actual index size on-disk.
Index root pages were not counted in internal_pages, which is inconsistent
compared to the case of a root that's also a leaf (one-page index), where
the root would be counted in leaf_pages. Aside from that inconsistency,
this could lead to additional transient discrepancies between the reported
page counts and index_size, since it's possible for pgstatindex's scan to
see zero or multiple pages marked as BTP_ROOT, if the root moves due to
a split during the scan. With these fixes, index_size will always be
exactly one page more than the sum of the displayed page counts.
Also, the index_size result was incorrectly documented as being measured in
pages; it's always been measured in bytes. (While fixing that, I couldn't
resist doing some small additional wordsmithing on the pgstattuple docs.)
Including the metapage causes the reported index_size to not be zero for
an empty index. To preserve the desired property that the pgstattuple
regression test results are platform-independent (ie, BLCKSZ configuration
independent), scale the index_size result in the regression tests.
The documentation issue was reported by Otsuka Kenji, and the inconsistent
root page counting by Peter Geoghegan; the other problems noted by me.
Back-patch to all supported branches, because this has been broken for
a long time.
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Clarify the description of which transactions will block a CREATE INDEX
CONCURRENTLY command from proceeding, and mention that the index might
still not be usable after CREATE INDEX completes. (This happens if the
index build detected broken HOT chains, so that pg_index.indcheckxmin gets
set, and there are open old transactions preventing the xmin horizon from
advancing past the index's initial creation. I didn't want to explain what
broken HOT chains are, though, so I omitted an explanation of exactly when
old transactions prevent the index from being used.)
Per discussion with Chris Travers. Back-patch to all supported branches,
since the same text appears in all of them.
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Change "In this case" to "In the example above" to clarify what it
actually refers to.
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In runtime.sgml, the old formulas for calculating the reasonable
values of SEMMNI and SEMMNS were incorrect. They have forgotten to
count the number of semaphores which both the checkpointer process
(introduced in 9.2) and the background worker processes (introduced
in 9.3) need.
This commit fixes those formulas so that they count the number of
semaphores which the checkpointer process and the background worker
processes need.
Report and patch by Kyotaro Horiguchi. Only the patch for 9.3 was
modified by me. Back-patch to 9.2 where the checkpointer process was
added and the number of needed semaphores was increased.
Author: Kyotaro Horiguchi
Reviewed-by: Fujii Masao
Backpatch: 9.2
Discussion: http://www.postgresql.org/message-id/20160203.125119.66820697.horiguchi.kyotaro@lab.ntt.co.jp
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Many automated test suites call pg_ctl. Buildfarm members axolotl,
hornet, mandrill, shearwater, sungazer and tern have failed when server
shutdown took longer than the pg_ctl default 60s timeout. This addition
permits slow hosts to easily raise the timeout without us editing a
--timeout argument into every test suite pg_ctl call. Back-patch to 9.1
(all supported versions) for the sake of automated testing.
Reviewed by Tom Lane.
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Security: CVE-2016-0773
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Get rid of the false implication that PRIMARY KEY is exactly equivalent to
UNIQUE + NOT NULL. That was more-or-less true at one time in our
implementation, but the standard doesn't say that, and we've grown various
features (many of them required by spec) that treat a pkey differently from
less-formal constraints. Per recent discussion on pgsql-general.
I failed to resist the temptation to do some other wordsmithing in the
same area.
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These were never documented anywhere user-visible. Tut tut.
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Error reported by Igal Sapir.
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Patch-by: Oleksandr Shulgin
Reviewed-by: Craig Ringer and Fujii Masao
Backpatch-through: 9.4 where logical decoding was introduced
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As pointed out by Michael Paquier, recovery_min_apply_delay didn't exist
in 9.0-9.3, making the release note text not very useful. Instead make it
talk about recovery_target_xid, which did exist then.
9.0 is already out of support, but we can fix the text in the newer
branches' copies of its release notes.
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Backpatch certain files through 9.1
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Common mathematical convention is that exponentiation associates right to
left. We aren't going to change the parser for this, but we could note
it in the operator's description. (It's already noted in the operator
precedence/associativity table, but users might not look there.)
Per bug #13829 from Henrik Pauli.
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Tone down an overly strong statement about which pseudo-types PLs are
likely to allow. Add "event_trigger" to the list, as well as
"pg_ddl_command" in 9.5/HEAD. Back-patch to 9.3 where event_trigger
was added.
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This has worked that way for a long time, maybe always, but you would
not have known it from the documentation. Also back-patch the notes
I added to HEAD earlier today about behavior of the "-f -" switch,
which likewise have been valid for many releases.
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Paul Ramsey
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In commit 1ea0c73c2 I added a section to user-manag.sgml about how to drop
roles that own objects; but as pointed out by Stephen Frost, I neglected
that shared objects (databases or tablespaces) may need special treatment.
Fix that. Back-patch to supported versions, like the previous patch.
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The POSIX standard for tar headers requires archive member sizes to be
printed in octal with at most 11 digits, limiting the representable file
size to 8GB. However, GNU tar and apparently most other modern tars
support a convention in which oversized values can be stored in base-256,
allowing any practical file to be a tar member. Adopt this convention
to remove two limitations:
* pg_dump with -Ft output format failed if the contents of any one table
exceeded 8GB.
* pg_basebackup failed if the data directory contained any file exceeding
8GB. (This would be a fatal problem for installations configured with a
table segment size of 8GB or more, and it has also been seen to fail when
large core dump files exist in the data directory.)
File sizes under 8GB are still printed in octal, so that no compatibility
issues are created except in cases that would have failed entirely before.
In addition, this patch fixes several bugs in the same area:
* In 9.3 and later, we'd defined tarCreateHeader's file-size argument as
size_t, which meant that on 32-bit machines it would write a corrupt tar
header for file sizes between 4GB and 8GB, even though no error was raised.
This broke both "pg_dump -Ft" and pg_basebackup for such cases.
* pg_restore from a tar archive would fail on tables of size between 4GB
and 8GB, on machines where either "size_t" or "unsigned long" is 32 bits.
This happened even with an archive file not affected by the previous bug.
* pg_basebackup would fail if there were files of size between 4GB and 8GB,
even on 64-bit machines.
* In 9.3 and later, "pg_basebackup -Ft" failed entirely, for any file size,
on 64-bit big-endian machines.
In view of these potential data-loss bugs, back-patch to all supported
branches, even though removal of the documented 8GB limit might otherwise
be considered a new feature rather than a bug fix.
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This back-ports commit 13d856e177e69083 and assorted followon patches
into 9.4 and 9.5. 9.5 and HEAD are now substantially identical in all
the files touched by this commit, except that 010_pg_basebackup.pl has
a few more tests related to the new --slot option. 9.4 has many fewer
TAP tests, but the test infrastructure files are substantially the same,
with the exception that 9.4 lacks the single-tmp-install infrastructure
introduced in 9.5 (commit dcae5faccab64776).
The primary motivation for this patch is to ensure that TAP test case
fixes can be back-patched without hazards of the kind seen in commits
34557f544/06dd4b44f. In principle it should also make the world safe
for running the TAP tests in the buildfarm in these branches; although
we might want to think about back-porting dcae5faccab64776 to 9.4 if
we're going to do that for real, because the TAP tests are quite disk
space hungry without it.
Michael Paquier did the back-porting work; original patches were by
him and assorted other people.
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Commit 8457d0beca731bf0 introduced an example which, while not incorrect,
failed to exhibit the behavior it meant to describe, as a result of omitting
an E'' prefix that needed to be there. Noticed and fixed by Peter Geoghegan.
I (tgl) failed to resist the temptation to wordsmith nearby text a bit
while at it.
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In commit a5ec86a7c787832d28d5e50400ec96a5190f2555 I wrote a quick hack
that reduced the number of TeX string pool entries created while converting
our documentation to PDF form. That held the fort for awhile, but as of
HEAD we're back up against the same limitation. It turns out that the
original coding of \FlowObjectSetup actually results in *three* string pool
entries being generated for every "flow object" (that is, potential
cross-reference target) in the documentation, and my previous hack only got
rid of one of them. With a little more care, we can reduce the string
count to one per flow object plus one per actually-cross-referenced flow
object (about 115000 + 5000 as of current HEAD); that should work until
the documentation volume roughly doubles from where it is today.
As a not-incidental side benefit, this change also causes pdfjadetex to
stop emitting unreferenced hyperlink anchors (bookmarks) into the PDF file.
It had been making one willy-nilly for every flow object; now it's just one
per actually-cross-referenced object. This results in close to a 2X
savings in PDF file size. We will still want to run the output through
"jpdftweak" to get it to be compressed; but we no longer need removal of
unreferenced bookmarks, so we might be able to find a quicker tool for
that step.
Although the failure only affects HEAD and US-format output at the moment,
9.5 cannot be more than a few pages short of failing likewise, so it
will inevitably fail after a few rounds of minor-version release notes.
I don't have a lot of faith that we'll never hit the limit in the older
branches; and anyway it would be nice to get rid of jpdftweak across the
board. Therefore, back-patch to all supported branches.
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Backpatch to 9.3, where it was initially omitted.
Craig Ringer, with minor adjustment by Kevin Grittner
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Mistake introduced by commit 5bd91e3a835b5d5499fee5f49fc7c0c776fe63dd.
Hari Babu
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Show how this can be used in practice to make queries simpler and more
flexible. Also, draw an explicit contrast to the existence operator,
which doesn't work that way.
Peter Geoghegan and Tom Lane
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